How to run an application by clicking on hyperlink you get in an e-mail in your mail client? [closed]

Answer 1

You can register a custom URL protocol handler: http://blogs.msdn.com/b/noahc/archive/2006/10/19/register-a-custom-url-protocol-handler.aspx

For example look at HKEY_CLASSES_ROOT\http or HKEY_CLASSES_ROOT\ftp to get an idea of how to do it.

The shell\open\command key has a default value which contains the executable to run when the URL protocol is triggered.